Synthetic (Not A Natural Rock)

Weathered, rounded rock (likely metamorphic or igneous)

Undetermined; possibly a quartz- and feldspar-bearing rock

Possible basalt or industrial iron-rich slag

Basalt (plagioclase–pyroxene rock); identification uncertain from image

Gemstone rings (stones not reliably identifiable)

The pale stone may be quartz or another translucent gem; the red stone may be ruby, garnet, or synthetic corundum. Image detail is insufficient for identification.

Beach Pebble Quartzite / Chalcedony Pebble

Silicon Dioxide (SiO2)

Rainbow Hematite / Magnetic Hematite

Iron oxide (Fe2O3) - often synthetic/coated for beads

Emerald in Matrix

Beryl (Be3Al2Si6O18) with trace amounts of Chromium/Vanadium

Purple cabochon gemstone, likely amethyst or purple sapphire/spinel

Indeterminate from image; possible quartz (SiO₂), corundum (Al₂O₃), or spinel (MgAl₂O₄)

Opalite

Synthetic Silicon Dioxide (SiO2)

Faceted yellow gemstone (possibly citrine or synthetic glass)

Undetermined; citrine is yellow quartz (SiO₂), but the image cannot confirm the material

Blue faceted gemstone, likely synthetic sapphire or blue spinel

Corundum (Al₂O₃) if sapphire; alternatively magnesium aluminate spinel (MgAl₂O₄)

Emerald-and-diamond ring

Emerald: beryl, Be₃Al₂(SiO₃)₆, colored by chromium and/or vanadium; surrounding stones appear to be diamonds: carbon

Ferruginous Slag (Iron Smelting Byproduct)

Fused Silicate Scoria (Amorphous mixture of FeO, SiO2, and CaO)

Green stone fragment (unidentified)

Undetermined; possibly serpentine or greenstone, but the image is insufficient for identification

Faceted red gemstone, likely ruby

Corundum (Al₂O₃), colored red by chromium; identity cannot be confirmed from the image alone

Painted River Rock

Polished fluvial clast with acrylic/synthetic pigment coating

Turquoise cabochon pendant

Turquoise, hydrated copper aluminum phosphate — CuAl₆(PO₄)₄(OH)₈·4H₂O

Blue slag glass / industrial glass fragment

Artificial silicate glass, composition variable; likely copper- or cobalt-colored furnace slag

Blue crystal pendant (likely blue glass or synthetic crystal)

Not identifiable from the image; possibly synthetic quartz or glass, rather than a natural mineral

Faceted colorless gemstone, likely quartz (rock crystal)

Quartz, SiO₂

Road-surface aggregate (crushed stone)

Unidentifiable mixed lithic aggregate; likely basaltic/andesitic fragments with feldspar, quartz, and weathered rock

Concrete Paver (Artificial Cementitious Rock)

Hydrated Portland Cement Aggregate

Red gemstone ring, likely ruby or synthetic ruby

Corundum (Al₂O₃), chromium-colored; the image alone cannot confirm whether it is natural or synthetic

Asphalt (Bituminous Concrete)

Bituminous mix / Anthropogenic conglomerate

Faceted purple gemstone, likely amethyst

Amethyst, purple variety of quartz (SiO₂)

Faceted red ruby

Corundum (Al₂O₃), colored red by chromium

Red/pink faceted gemstone, likely synthetic ruby or red glass

Corundum (Al₂O₃) if ruby; identity cannot be confirmed visually

Blue stone cabochon, likely lapis lazuli or dyed stone

Lapis lazuli: lazurite-rich rock, chiefly (Na,Ca)₈(AlSiO₄)₆(S,SO)₂; exact identification is uncertain from the image

Colorless faceted gemstone (likely cubic zirconia)

Cubic zirconia, ZrO₂ (synthetic zirconium dioxide); possibly synthetic glass or lab-grown diamond

Clear Quartz (Faceted) / White Sapphire / Goshenite

Silicon Dioxide (SiO2) / Aluminium Oxide (Al2O3)

Blue-green turquoise (probable)

Turquoise — hydrated copper aluminum phosphate, CuAl₆(PO₄)₄(OH)₈·4H₂O

Faceted black gemstone, likely black spinel

Spinel, MgAl₂O₄ (identification from appearance is uncertain)

Opal stud earrings

Opal, hydrated amorphous silica (SiO₂·nH₂O)

Angular gray rock fragments

Unidentified fine-grained rock; the image does not show diagnostic features sufficient for a specific identification

Carved greenstone figure

Likely nephrite jade (jadeite is a possible alternative), mainly amphibole-group minerals

Chipped Glass/Plastic Fragment

Silicon dioxide (SiO2) for glass (amorphous) or various polymer compounds for plastic

Faceted blue gemstone, likely blue sapphire

Corundum (Al₂O₃); identification from the image is provisional

Synthetic Faux Fur Fursuit

Polyacrylonitrile / Polyester (Synthetic Textile)

Green faceted gemstone earrings, likely synthetic emerald-colored glass or cubic zirconia

Undetermined; possible glass (amorphous silicate) or synthetic cubic zirconia (ZrO₂)

Red glassy mineral specimen, likely synthetic ruby or red spinel

Most consistent with synthetic corundum (Al₂O₃, ruby) or synthetic spinel (MgAl₂O₄); exact identification requires testing

Blue gemstone ring (likely sapphire)

Likely corundum, Al₂O₃; the dark, reflective appearance may also indicate a treated or synthetic stone.

Ruby (set in a ring; possibly synthetic or imitation)

Corundum, Al₂O₃; red color is typically caused by chromium

Dyed Agate

Silicon Dioxide (SiO2) with synthetic dyes